Display substrate and display apparatus

Abstract

A display substrate and a display apparatus are provided. The display substrate includes a first conductive structure including a first surface and a third surface that are opposite and a second surface and a fourth surface that are opposite. The first surface and the second surface respectively have different angles with a plate surface of the base substrate. The first surface and the second surface are respectively provided with a first surface microstructure and a second surface microstructure; the first cross section has a first orthogonal projection on the third surface, and a length of the first orthogonal projection is less than a length of the first surface microstructure in the first cross section; the second cross section has a second orthogonal projection on the fourth surface, and a length of the second orthogonal projection is less than a length of the second surface microstructure in the second cross section.

What is claimed is: 
     
       1. A display substrate, comprising a base substrate and a first conductive structure on the base substrate,
 wherein the first conductive structure comprises a first surface and a second surface away from the base substrate, and the first surface and the second surface are made of a same material; 
 the first surface has a first included angle with a plate surface of the base substrate, the second surface has a second included angle with the plate surface of the base substrate, and the first included angle is different from the second included angle; 
 the first surface is provided with a first surface microstructure, and the second surface is provided with a second surface microstructure; 
 the first conductive structure further comprises a third surface and a fourth surface close to the base substrate, the third surface is opposite to the first surface, and the fourth surface is opposite to the second surface; 
 the first surface microstructure has a first cross section perpendicular to the base substrate, the first cross section has a first orthogonal projection on the third surface, and a length of the first orthogonal projection is less than a length of the first surface microstructure in the first cross section; and 
 the second surface microstructure has a second cross section perpendicular to the base substrate, the second cross section has a second orthogonal projection on the fourth surface, and a length of the second orthogonal projection is less than a length of the second surface microstructure in the second cross section. 
 
     
     
       2. The display substrate according to  claim 1 , wherein in a direction perpendicular to the base substrate, the first surface microstructure at least partially overlaps with the third surface, and the second surface microstructure at least partially overlaps with the fourth surface;
 at least one of the third surface and the fourth surface is a flat surface. 
 
     
     
       3. The display substrate according to  claim 1 , wherein an area of the orthogonal projection of the first surface microstructure on the third surface is less than a surface area of the first surface microstructure; and
 an area of the orthogonal projection of the second surface microstructure on the fourth surface is less than a surface area of the second surface microstructure. 
 
     
     
       4. The display substrate according to  claim 1 , wherein a minimum thickness of the first conductive structure at the first surface microstructure is less than an average thickness of the first conductive structure and greater than ⅗ of the average thickness of the first conductive structure. 
     
     
       5. The display substrate according to  claim 1 , wherein the first surface microstructure has a first end point, a first intermediate point and a second end point in the first cross section; and the second surface microstructure has a third end point, a second intermediate point, and a fourth end point in the second cross section;
 a distance between the first intermediate point and the third surface is equal to neither a distance between the first end point and the third surface nor a distance between the second end point and the third surface; 
 a distance between the second intermediate point and the fourth surface is equal to neither a distance between the third end point and the fourth surface, nor a distance between the fourth end point and the fourth surface. 
 
     
     
       6. The display substrate according to  claim 1 , wherein the first included angle is greater than 0 degrees; and the second included angle is equal to 0 degrees. 
     
     
       7. The display substrate according to  claim 6 , further comprising a first insulating layer on a side of the first conductive structure close to the base substrate,
 wherein the first insulating layer comprises a first portion in direct contact with the third surface of the first conductive structure and a second portion in direct contact with the fourth surface of the first conductive structure; and 
 a minimum thickness of the first portion is less than a minimum thickness of the second portion. 
 
     
     
       8. The display substrate according to  claim 7 , further comprising a second conductive structure on a side of the first insulating layer close to the base substrate, wherein in a direction perpendicular to the base substrate, the first surface microstructure and the second conductive structure are not overlapped with each other; and
 the first conductive structure is electrically connected with the second conductive structure through a first via hole running through the first insulating layer; 
 in a direction perpendicular to the base substrate, the first surface microstructure is at least partially overlapped with the first via hole. 
 
     
     
       9. The display substrate according to  claim 8 , wherein the first insulating layer comprises a first sub-layer and a second sub-layer that are stacked, and the second sub-layer is farther away from the base substrate than the first sub-layer; and
 the first sub-layer comprises a first side surface exposed by the first via hole, the second sub-layer comprises a second side surface exposed by the first via hole, and at least one of the first side surface and the second side surface is in direct contact with the third surface of the first conductive structure. 
 
     
     
       10. The display substrate according to  claim 9 , wherein an included angle between the first side surface and the base substrate is greater than an included angle between the second side surface and the base substrate. 
     
     
       11. The display substrate according to  claim 1 , wherein the first surface microstructure has a first end point and a second end point in the first cross section; and the second surface microstructure has a third end point and a fourth end point in the second cross section;
 a distance from a midpoint of a line segment between the first end point and the second end point to the plate surface of the base substrate is different from a distance from a midpoint of a line segment between the third end point and the fourth end point to the plate surface of the base substrate; and 
 a distance between the first end point and the second end point is greater than a distance between the third end point and the fourth end point. 
 
     
     
       12. The display substrate according to  claim 1  wherein the first surface microstructure has a first end point and a second end point in the first cross section; and distances from a point of the first cross section that is closest to the third surface to the first end point and the second end point are unequal. 
     
     
       13. The display substrate according to  claim 1 , wherein the first surface microstructure comprises a first concave structure, and the second surface microstructure comprises a second concave structure. 
     
     
       14. The display substrate according to  claim 1 , further comprising a plurality of sub-pixels on the base substrate,
 wherein the plurality of sub-pixels are arranged as a plurality of pixel columns and a plurality of pixel rows along a first direction and a second direction, the first direction intersecting with the second direction; 
 each of the plurality of sub-pixels comprises a first transistor, a second transistor, a third transistor, and a storage capacitor on the base substrate; 
 a first electrode of the second transistor is electrically connected with a first capacitor electrode of the storage capacitor and a gate electrode of the first transistor, a second electrode of the second transistor is configured to receive a data signal, a gate electrode of the second transistor is configured to receive a first control signal, and the second transistor is configured to write the data signal into the gate electrode of the first transistor and the storage capacitor in response to the first control signal; 
 a first electrode of the first transistor is electrically connected with a second capacitor electrode of the storage capacitor, and is configured to be electrically connected with a first electrode of the light-emitting element, a second electrode of the first transistor is configured to receive a first power supply voltage, and the first transistor is configured to control a current used to drive the light-emitting element under control of a voltage of the gate electrode of the first transistor; and 
 a first electrode of the third transistor is electrically connected with the first electrode of the first transistor and the second capacitor electrode of the storage capacitor, and a second electrode of the third transistor is configured to be connected with a detection circuit. 
 
     
     
       15. The display substrate according to  claim 14 , wherein components of a center distance between an orthogonal projection of the first surface microstructure on the base substrate and an orthogonal projection of the second surface microstructure on the base substrate in the first direction and in the second direction are respectively less than average sizes of each of the plurality of sub-pixels in the first direction and the second direction. 
     
     
       16. The display substrate according to  claim 14 ,
 wherein the display substrate further comprises an extension portion protruding from the gate electrode of the first transistor, the extension portion is extended from the gate electrode of the first transistor along the second direction, and the extension portion is at least partially overlapped with the first electrode of the second transistor and is electrically connected with the first electrode of the second transistor in a direction perpendicular to the base substrate. 
 
     
     
       17. The display substrate according to  claim 16 , wherein an active layer of the second transistor comprises a first electrode contact region, a second electrode contact region, and a channel region between the first electrode contact region and the second electrode contact region; and
 the first electrode of the second transistor is respectively electrically connected with the first electrode contact region, the extension portion, and the first capacitor electrode through a second via hole. 
 
     
     
       18. The display substrate according to  claim 17 , wherein the second via hole is extended along the first direction and exposes at least a portion of a surface of the extension portion and two side surfaces, which are opposite in the first direction, of the extension portion. 
     
     
       19. The display substrate according to  claim 18 , wherein the extension portion spaces the second via hole into a first groove and a second groove; the first electrode of the second transistor fills the first groove and the second groove and covers the two side surfaces of the extension portion;
 the first electrode of the second transistor comprises a first portion, a second portion and a third portion; and 
 the second portion covers the surface of the extension portion, the first portion covers the first groove, and the third portion covers the second groove; the first portion and the third portion also respectively cover the two side surfaces of the extension portion. 
 
     
     
       20. The display substrate according to  claim 19 , wherein the first conductive structure is the first electrode of the second transistor; and
 the first surface microstructure and the second surface microstructure are both in the third portion of the first electrode of the second transistor. 
 
     
     
       21. The display substrate according to  claim 20 , wherein a size of the first surface microstructure in the first direction is less than one-tenth of a maximum size of the third portion along the first direction. 
     
     
       22. The display substrate according to  claim 20 , wherein a size of the first surface microstructure in the first direction is less than one-tenth of a maximum size of an orthogonal projection of the second via hole on the base substrate in the first direction. 
     
     
       23. The display substrate according to  claim 14 , wherein each of the plurality of sub-pixels further comprises the light-emitting element, the light-emitting element comprises a first electrode, a light-emitting layer and a second electrode stacked in sequence, and the first electrode is closer to the base substrate than the second electrode; and
 the first electrode of the light-emitting element is electrically connected with the first electrode of the first transistor of the sub-pixel to which the light-emitting element belongs through a third via hole 
 the first electrode of the light-emitting element comprises a first electrode portion, a second electrode portion, and a third electrode portion that are sequentially connected in the first direction; the first electrode portion is configured to be electrically connected with the first electrode of a corresponding first transistor and is overlapped with the first electrode of the corresponding first transistor in a direction perpendicular to the base substrate; 
 the third electrode portion of the light-emitting element at least partially overlaps with an opening region of the light-emitting element in the direction perpendicular to the base substrate. 
 
     
     
       24. The display substrate according to  claim 23 , wherein a sum of a maximum size of the first electrode portion along the first direction and a maximum size of the first electrode portion along the second direction is less than a sum of a maximum size of the third electrode portion along the first direction and a maximum size of the third electrode portion along the second direction; and
 a sum of a maximum size of the second electrode portion along the first direction and a maximum size of the second electrode portion along the second direction is less than the sum of the maximum size of the third electrode portion along the first direction and the maximum size the third electrode portion along the second direction. 
 
     
     
       25. The display substrate according to  claim 23 , wherein for at least one of the plurality of sub-pixels, the display substrate comprises a plurality of first surface microstructures and a plurality of second surface microstructures;
 some of the plurality of first surface microstructures and the plurality of second surface microstructures are overlapped with the first electrode portion in the direction perpendicular to the base substrate, and the others of the plurality of first surface microstructures and the plurality of second surface microstructures are overlapped with the third electrode portion in the direction perpendicular to the base substrate; and 
 distribution density of the first surface microstructures and the second surface microstructures overlapping with the first electrode portion is greater than distribution density of the first surface microstructures and the second surface microstructures overlapping with the third electrode portion of the light emitting-element of the at least one sub-pixel. 
 
     
     
       26. The display substrate according to  claim 23 , wherein an average size of the second electrode portion of the first electrode of the light-emitting element in the second direction is less than an average size of the first electrode portion in the second direction, and is also less than an average size of the third electrode portion in the second direction. 
     
     
       27. The display substrate according to  claim 23  wherein the plurality of pixel rows comprise a first pixel row, and the first pixel row is divided into a plurality of pixel units;
 each of the plurality of pixel units comprises a first sub-pixel, a second sub-pixel, and a third sub-pixel that are sequentially arranged along the second direction; 
 the display substrate further comprises a first scan line extended along the second direction; the first scan line is electrically connected with gate electrodes of second transistors in the first sub-pixel, the second sub-pixel, and the third sub-pixel to supply the first control signal. 
 
     
     
       28. The display substrate according to  claim 27 , further comprising a color filter layer, wherein the color filter layer is on a side of the first electrode of the light-emitting element close to the base substrate;
 the color filter layer comprises a plurality of color filter portions respectively corresponding to the first sub-pixel, the second sub-pixel, and the third sub-pixel; and 
 light emitted by the first sub-pixel, the second sub-pixel, and the third sub-pixel is respectively emergent through the corresponding color filter portions to form display light of three primary colors respectively. 
 
     
     
       29. The display substrate according to  claim 28 , wherein in the direction perpendicular to the base substrate, each of the color filter portions is overlapped with the third electrode portion of the first electrode of a light-emitting element of a corresponding sub-pixel, and is not overlapped with the first electrode portion of the first electrode of the light-emitting element of the corresponding sub-pixel. 
     
     
       30. The display substrate according to  claim 29 , wherein the first scan line is on a side of the color filter layer close to the base substrate;
 in the direction perpendicular to the base substrate, the second electrode portion of the first electrode of the light-emitting element of the first sub-pixel overlapping with the first scan line also overlaps with the color filter portion corresponding to the first sub-pixel. 
 
     
     
       31. The display substrate according to  claim 28 , wherein the first scan line comprises first portions and second portions that are alternately connected; and each of the second portion is in a ring structure the display substrate further comprises a plurality of first signal lines extended along the first direction; and
 in the direction perpendicular to the base substrate, the plurality of first signal lines overlap with the second portions of the first scan line to define a plurality of first hollow regions along the second direction. 
 
     
     
       32. The display substrate according to  claim 31 , wherein in the direction perpendicular to the base substrate, the color filter portion corresponding to the first sub-pixel is overlapped with at least one of the plurality of first hollow regions; and the color filter portion corresponding to the second sub-pixel is overlapped with none of the plurality of first hollow regions. 
     
     
       33. The display substrate according to  claim 31 , wherein in the direction perpendicular to the base substrate, the color filter portion corresponding to the first sub-pixel is overlapped with one of the plurality of first hollow regions with a first overlap area; the color filter portion corresponding to the second sub-pixel is overlapped with another of the plurality of first hollow regions with a second overlap area; and
 the first overlap area is different from the second overlap area. 
 
     
     
       34. The display substrate according to  claim 33 , wherein the display substrate comprises a plurality of first surface microstructures and a plurality of second surface microstructures; and some of the plurality of first surface microstructures and the plurality of second surface microstructures are overlapped with the first portions of the first scan line in the direction perpendicular to the base substrate; and the others of the plurality of first surface microstructures and the plurality of second surface microstructures are overlapped with the second portions of the first scan line in the direction perpendicular to the base substrate;
 in the direction perpendicular to the base substrate, distribution density of the first surface microstructures and the second surface microstructures overlapping with the second portions of the first scan line is greater than distribution density of the first surface microstructures and the second surface microstructures overlapping with the first portions of the first scan line. 
 
     
     
       35. The display substrate according to  claim 34 , wherein the first overlap area is greater than an area of an orthogonal projection of each of the plurality of first surface microstructures or second surface microstructures on the base substrate;
 the second overlap area is greater than an area of an orthogonal projection of each of the plurality of first surface microstructures or second surface microstructures on the base substrate. 
 
     
     
       36. The display substrate according to  claim 31 , wherein each of the plurality of pixel unit further comprises a fourth sub-pixel, and the fourth sub-pixel is configured to emit white light;
 none of first hollow regions close to the fourth sub-pixel among the plurality of first hollow regions is overlapped with the color filter layer in the direction perpendicular to the base substrate. 
 
     
     
       37. The display substrate according to  claim 31 , wherein the plurality of signal lines comprise a plurality of data lines, and the plurality of data lines are connected in one-to-one correspondence with the plurality of pixel columns;
 for the first pixel row, the plurality of data lines are divided into a plurality of data line groups in one-to-one correspondence with the plurality of pixel units; each of the plurality of data line groups comprises a first data line, a second data line and a third data line respectively connected with the first sub-pixel, the second sub-pixel, and the third sub-pixel; 
 for each of the plurality of pixel units, the first data line, the second data line and the third data line in corresponding connection with the each pixel unit are all located between the first sub-pixel and the third sub-pixel. 
 
     
     
       38. The display substrate according to  claim 37 , further comprising a plurality of power lines extended along the first direction,
 wherein the plurality of power lines are configured to supply a first power supply voltage to the plurality of sub-pixels; and 
 between each of the plurality of power lines and any one of the plurality of data lines is provided with at least one pixel column. 
 
     
     
       39. The display substrate according to  claim 38 , wherein the display substrate comprises a plurality of first surface microstructures and a plurality of second surface microstructures; some of the plurality of first surface microstructures and the plurality of second surface microstructures are distributed on the plurality of data lines, the others of the plurality of first surface microstructures and the plurality of second surface microstructures are distributed on the plurality of power lines;
 distribution density of the plurality of first surface microstructures and the plurality of second surface microstructures on the plurality of data lines is greater than distribution density of the plurality of first surface microstructures and the plurality of second surface microstructures on the plurality of power lines. 
 
     
     
       40. The display substrate according to  claim 37 , wherein the second sub-pixel is directly adjacent to the third sub-pixel, and the third sub-pixel has a first side and a second side opposite to each other in the second direction; and
 the second data line and the third data line are located on the first side of the third sub-pixel and located between the second sub-pixel and the third sub-pixel; 
 the second electrode portion of the first electrode of the light-emitting element of the third sub-pixel is concave relative to the first electrode portion and the third electrode portion of the first electrode of the light-emitting element of the third sub-pixel in a direction away from the second side of the third sub-pixel. 
 
     
     
       41. The display substrate according to  claim 37 , wherein in the direction perpendicular to the substrate, the second data line and the third data line are respectively at least partially overlapped with the color filter layer;
 each of the plurality of pixel units further comprises a fourth sub-pixel, and the fourth sub-pixel is configured to emit white light; 
 each of the data line groups further comprises a fourth data line connected with the fourth sub-pixel; and 
 in the direction perpendicular to the base substrate, the fourth data line does not overlap with the color filter layer. 
 
     
     
       42. A display apparatus, comprising the display substrate according to  claim 1 .